I'm an undergraduate student at the University of Georgia and I'm using your system, UCSF Chimera, for my powerpoint presentation. I'm having some problems with trying to create a movie. I have a MacBook Pro, which I just got this recent August, and downloaded the latest Chimera version for the Mac. I'm trying to save the commands in a separate file, like TextEdit, but I don't know what type of file to save it as. I'm hoping to be able to open the file through Chimera to play the movie. I tried saving the commands as "movie.cmd" but TextEdit is not allowing me to save that type of file. Any help would be greatly appreciated.